Chesterfield, MO (63005)
Mo American St Louis St Charles Counties
Safety Grade 8
Health Violations 3
Filterable Contaminants
Contaminants & Recommended Filters
Best Value Recommendation
With 3 contaminants detected, a Reverse Osmosis system is your most cost-effective option — it handles multiple contaminants with a single unit.
Want to know exactly what's in your tap water?
EPA data shows system-wide averages. A home water test measures what actually comes out of your faucet.
Water Filter Analysis for Chesterfield, MO
EPA compliance data for ZIP code 63005 shows 3 contaminants that warrant filtration: Haloacetic Acids (HAA5), Chlorine (Residual Disinfectant), Total Trihalomethanes (TTHM). Below are filter recommendations matched to each contaminant, with cost estimates and NSF-certified options.
Haloacetic Acids (HAA5)
EPA limit: 0.060 mg/L
Long-term exposure may increase risk of cancer and cause reproductive or developmental problems.
Chlorine (Residual Disinfectant)
EPA limit: 4.0 mg/L (MRDL)
High levels can cause eye and nose irritation, stomach discomfort, and increased cancer risk with long-term exposure.
Total Trihalomethanes (TTHM)
EPA limit: 0.080 mg/L
Long-term exposure is associated with increased cancer risk (bladder, rectal) and adverse reproductive outcomes.
About This Analysis
This analysis uses data from the U.S. EPA Safe Drinking Water Information System (SDWIS), which tracks compliance monitoring for public water systems. Contaminant data reflects the past 5 years of testing. Filter recommendations are based on NSF/ANSI certified treatment technologies proven to reduce each specific contaminant.
ZIP 63005 is served by Mo American St Louis St Charles Counties, a surface water system. For the most accurate picture of your home's water quality, consider a professional water test.
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Frequently Asked Questions
How were these filters selected?
Filter recommendations are matched to the specific contaminants detected in your ZIP code's water system based on EPA SDWIS compliance data from the past 5 years. Each filter type is selected for its NSF/ANSI-certified effectiveness against those contaminants, so recommendations vary by location.
Do I need a whole-house or under-sink filter?
It depends on the contaminant type and your budget. Under-sink reverse osmosis systems ($150–$400) are best for drinking water contaminants like lead, nitrates, and PFAS. Whole-house systems ($800–$2,000+) treat all water entering your home and are better for sediment, chlorine, and hardness issues that also affect showers and appliances.
How often should I replace filter cartridges?
Most filter cartridges should be replaced every 6 to 12 months, depending on your water usage and contaminant levels. Carbon filters typically last 6 months, while reverse osmosis membranes last 2–3 years. Check your filter manufacturer's guidelines and replace on schedule to maintain effectiveness.